Overnighter w/ Merc 150 4 stroke performance?

[BigI]

Has anyone re-powered their overnighter with the merc 150 4 stroke? If so what kind of performance numbers did you get?

I'm going to be facing the re-power decision sooner or later. I'm still running the original 87 150 yamaha

 

[BigI]

I guess that would be a no.

 

[VeroWing]

You should see similar performance, and a little more weight on the transom. Will be quieter, less fumes, and more user friendly. I think Yamaha has a new 200hp 4cyld 4str engine, does Merc also have the same, or is their 200hp 4str a 6cyld? If a 4 cyld, weight should be similar to the 150hp, with more hp!

 

[Bigfoot]

I have a 200 Yamaha 4 banger on mine. The new yamaha 200 is the right motor.

Do it once do it right

 

[BigI]

Thanks for the feedback. It looks like no one repowered with the merc yet.

 

[BigI]

I checked out the new yamaha 200. It retails around $19K while the 150 Merc retails around $10K (Ed's Marine price). That's a huge difference. Not sure it would be worth it.

 

[RBallou]

I repowered my 1999 208 Adventure (no hardtop) with a 150hp Mercury Verado (4-stroke), which I think is a successor to the Overnighter. Had a 200 Optimax previously. I have run the Verado for 8 years now and can say that it works fine for me. I too was concerned about weight since the boat was designed during the 2-stroke era. Because the Verado is supercharged, it has good low-end torque to get on plane easily. The weight is similar to a 6-cylinder 2-stroke engine. The efficiency is about 4 mpg and the WOT speed is about 38-40 mph. Mercury now has a 200 4-cylinder Verado with the same weight. Mercury also produces a non-supercharged 150hp that even weighs less than the Verado model, but the performance may not be the quite same. However, it weighs less than the Verado and I believe it is less expensive.